package com.pl.grainmall.order.service.impl;

import com.alibaba.fastjson.JSON;
import com.pl.grainmall.order.entity.OrderReturnReasonEntity;
import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.Channel;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessageProperties;
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.util.Map;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.pl.common.utils.PageUtils;
import com.pl.common.utils.Query;

import com.pl.grainmall.order.dao.OrderItemDao;
import com.pl.grainmall.order.entity.OrderItemEntity;
import com.pl.grainmall.order.service.OrderItemService;

@RabbitListener(queues = {"hello-java-queue"})
@Service("orderItemService")
public class OrderItemServiceImpl extends ServiceImpl<OrderItemDao, OrderItemEntity> implements OrderItemService {

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<OrderItemEntity> page = this.page(
                new Query<OrderItemEntity>().getPage(params),
                new QueryWrapper<OrderItemEntity>()
        );

        return new PageUtils(page);
    }

    /**
     * queues :声明需要监听的队列
     *
     * 参数可以写以下类型
     * 1.Message message: 原生消息详细信息； 头 + 体
     * 2.T<发送消息的类型>   OrderReturnReasonEntity content
     * 3.Channel channel: 当前传输数据的通道
     *
     * Queue：可以有很多人同时监听。只要收到消息，队列删除消息，而且只能有一个人收到此消息
     * 场景：
     *      1）、订单服务启动多个；同一个消息，只能有一个客户端收到
     *      2）、只一个消息完成处理完，方法运行结束，我们就可以接收到下一个消息
     *
     */
//    @RabbitListener(queues = {"hello-java-queue"})
    @RabbitHandler
    public void recieveMessage(Message message, OrderReturnReasonEntity content,
                               Channel channel) {
        //消息体
        byte[] body = message.getBody();

        //消息头属性信息
        MessageProperties messageProperties = message.getMessageProperties();
        System.out.println("接收到消息。。。。" + message + "====>内容" + content);
        System.out.println("消息处理完成。。。。" +  content.getName());

        //channel内按顺序自增的
        long deliveryTag = message.getMessageProperties().getDeliveryTag();
        System.out.println("deliveryTag===>"+deliveryTag);

        //签收货物,非批量模式
        try {
          if (deliveryTag%2==0){
              //收货
              channel.basicAck(deliveryTag,false);
              System.out.println("签收了货物。。。。"+deliveryTag);
          }else {
              //退货  var4=false 丢弃  var4=true 返回服务器，服务器重新入队
              //void basicNack(long var1, boolean var3, boolean var4) throws IOException;
              channel.basicNack(deliveryTag,false,true);
              //void basicReject(long var1, boolean var3) throws IOException;
//              channel.basicReject();
              System.out.println("没有签收货物。。。。"+deliveryTag);
          }
        } catch (IOException e) {
            //网络中断
            e.printStackTrace();
        }

    }

}